Lake County, South Dakota ZIP Codes
- ZIP records
7 - Cities represented
7 - Sum of listed ZIP population estimates
11,128
Population sum includes positive estimates in these ZIP records; it is not an official county population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | Population estimate |
|---|---|---|---|
| 1 | 57042 | Madison | 7,756 |
| 2 | 57075 | Wentworth | 1,296 |
| 3 | 57054 | Ramona | 703 |
| 4 | 57016 | Chester | 676 |
| 5 | 57076 | Winfred | 325 |
| 6 | 57057 | Rutland | 196 |
| 7 | 57050 | Nunda | 176 |
Cities in Lake County
ZIP Directory
Browse all ZIP data for South Dakota
Methodology: Records are grouped by the source file's listed county and state. Population sums add positive ZIP-level estimates and are not official county totals; city counts use distinct city labels in the source.